Gas floatation separation device

Abstract

The invention discloses an air flotation separation device, comprising an external cylinder (2), a rotational flow mixed cylinder (8), a first slag-retaining cylinder (7), a first scum drainage pipe (4) and a scum collecting guide plate (10); wherein, the bottom end of the first slag-retaining cylinder (7) and the bottom of the external cylinder (2) have spacing so as to form a water passage; thebottom of the side wall of the rotational flow mixed cylinder (8) is connected with a water inlet pipe (16) which enters in tangent direction; the periphery of the top of the external cylinder (2) isprovided with a clean water collecting trench (14); and the scum collecting guide plate (10) is a strip-typed plate in an involute shape, with the involute direction right opposite to the water rotational flow direction in the rotational flow mixed area (A). Compared with the prior art, the air flotation separation device does not need to add external energy cleaning systems, achieves the object of long-term continuously and stably running, and ensures that the requirement that the micro air bubbles adhere to the dispersed oil, emulsified oil and dissolved oil of small particle size as much as possible is met, thus achieving the object of high-efficiency separation of oil from water. The air flotation separation device is especially suitable for low-consistency water containing oil.

Description

An air flotation separation device technical field The invention relates to the technical field of oil-water separation treatment, in particular to an air flotation separation device for separating oil and water by using an air flotation method. Background technique The oily water in the production process of oil and natural gas comes from various links such as oil and natural gas exploitation, processing, refining, storage and transportation. Chemical agents and some microorganisms. Generally, the physical state of oil in oily water can be roughly divided into five types: slick oil, dispersed oil, emulsified oil, dissolved oil and solid-adhered oil. Usually, the above-mentioned physical states coexist. The commonly used physical treatment methods mainly include gravity method, centrifugation method, air flotation method, filtration method and membrane separation method. Among them, the air flotation method is to pass gas into the oily water in advance, so that the oil...

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Problems solved by technology

All kinds of releasers are installed inside the air flotation separation device. Because the releaser will often be blocked, an external energy cleaning system needs to be added. Sometimes the entire air flotation separation device needs to be stopped and the releaser can only be repaired after it is emptied. The maintenance operation is complicated. Trouble, but also affect production efficiency

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